"François Yves Le Gal" wrote in message
...
On Mon, 20 Mar 2006 16:55:02 -0500, "Robert Morein"
wrote:

It's one of the reasons: your gear is probably fitted with EMC filters
which are rendered ineffective if there's no proper ground connection.

That is not true

Morein, do you know the difference between common and differential mode
when
it comes to EMC filters? Then explain how a filter can properly work
without
a ground connection?

Francois, the neutral wire is of larger diameter than the ground wire. In
the U.S. the two are bonded at the service entrance. From the POV of EMI,
the two are equivalent.

Furthermore, the purpose of the cheater plug is to deal with a nonideal
condition:
The system has hum, and the owner is either unwilling or unable to solve
the problem by any other means.

In this case, the immediate problem takes priority. EMI is simply not the
issue, unless it happens to bother the user more than the hum. In that case,
perhaps the user will be happier without the cheater plug. He can figure
this out for himself.